Heterocyclic-nitrogen anthraquinone monoazo dyes



United States Patent 3,483,179 HETEROCYCLIC-NITROGEN ANTHRAQUINONE MONOAZO DYES Willy Braun, Heidelberg, and Rolf Mecke, Ludwigshafen (Rhine), Germany, assignors to Badische Anilin- 8: Soda-Fabrik Aktiengesellschaft, Ludwigshafen (Rhine), Germany No Drawing. Filed June 1, 1967, Ser. No. 642,707 Claims priority, applicatigg gegrmany, June 14, 1966,

1,5 Int. Cl. (30% 29/36; C07d 33/38, 51/42 US. Cl. 260-154 Claims ABSTRACT OF THE DISCLOSURE Heterocyclic-nitrogen anthraquinone azo dyes useful as pigments in the production of colored paints or printing inks.

This invention relates to new anthraquinone azo dyes having the general formula in which X denotes a hydrogen atom or a chlorine atom, X denotes a hydrogen atom or a chlorine atom and K denotes one of the radicals and 3,483,179 Patented Dec. 9, 1969 The new dyes (which are derived from 1-aminoanthra quinone. 1-amino-4-chloroanthraquinone or l-amino-S- chloroanthraquinone) are distinguished as pigment dyes by very good resistance to solvents, great tinctorial strength, clear shade and high fastness to light.

The dyes may be obtained by conventional methods by condensation or azo coupling, preferably by coupling iliazo compounds of amines having the general formula with coupling components having the general formula HK, the symbols X, X and K having the meanings given above. The new dyes may be used, if necessary after finishing by conventional methods, for all purposes of pigment technology, particularly for the production of colored paints or printing inks.

The invention is illustrated by the following examples in which parts and percentages are by weight.

EXAMPLE 1 22.5 parts of l-aminoanthraquinone is dissolved in 250 parts of 96% sulfuric acid. The solution is then poured onto a mixture of 1000 parts of ice-water and 7 parts of sodium nitrite, stirred for one hour while cooling with ice, excess of nitrite is destroyed in the usual way and the diazonium salt is suction filtered.

The diazonium salt is suspended in 1000 parts of Water and the solution is added in portions to a solution of 17 parts of 2,4-dihydroxyquinoline, 1000 parts of Water and 8 parts of sodium hydroxide, a pH value of 8 being maintained during coupling by adding dilute caustic soda solution. The whole is stirred for another five hours, suction filtered and washed with water. 35 parts of a yellow dye having the formula is obtained which is practically insoluble in organic solvents. Similar dyes are obtained in an analogous way using the starting materials specified in the following table:

Example Diazo component Coupling component Color 2 l-aminoanthraquinone Nor; Yellow.

| 3 d0 Red.

4 d0 N Yellow.

O H NH 5 do N D0 6 l-amino-4-ch1oroanthraquinone Do.

. "0 H I 7 .-do Red.

H NH 8 do Yellow;

ll NH 9 11 1-amino-5-chloroanthraquinone.. D0.

12 do OH D0.

5 6 We claim: 3. The dye having the formula 1. Dyes having the general formula H o N=NK II N I o H l I N l l l HO II I X 0 X H in which X denotes a hydrogen atom or a chlorine atom, 10 O X denotes a hydrogen atom or a chlorine atom and K 4. The dye having the formula denotes one of the radicals O H OH OH H N I I I O M3 [I I l N OH OH I N N I l 0 H O H lN 5. The dye having the formula 01 H Ht N He, N 0 Mac and H l N o H C Q N NH;

2. The dye having the formula References Cited UNITED STATES PATENTS N (I? 1TI=N- 0H 3,320,233 5/1967 Braun et al. 260155 4 CHARLES B. PARKER, Primary Examiner DONALD M. PARUGA, Assistant Examiner H US. Cl. X.R. 0 10622, 288; 260155, 256.4, 289 

